Sold item but buyer writes that I didnt informed him

Hi, please I need help, I sold this game codes:
I informed that its Tom Clancy’s The Division 2 PC(Samsung code)
and that redeem page is here:
redeem here: https://ghost-recon.ubisoft.com/game/en-gb/redeem?platform=PC
but buyer wrote that I tricked him and I uninformed him.
He bought 9 of these Samsung game codes for reselling on G2A and some of them he already sold, but he was selling them as Uplay codes.
https://gameflip.com/item/tom-clancy-s-ghost-recon-breakpoint-pc-instant-delivery/3acaf766-5753-4f8c-840b-2ab717ab9336
Please can you help me? I did everything I could
But even now one of nine transactions has been cancelled:
Order ID:
e863b22e-1366-450a-96d0-320122f90e9b

Please can you help me? I sold him also 8 more keys and I think that he will activate them. Thank you.

Even now he´s selling all 8 rest disputed keys:

@MajorTom @DarkKnight

Hello Samuel_Hronsky,

I will check this for you.

Thank you, can I ask you also about this one:
Order ID
e863b22e-1366-450a-96d0-320122f90e9b
Because only this one of all 9 was decided in buyers favor and all the rest were decided in my favor. Please can you check it?
Thank you

Thank you :smiley: